TMA-IIS-3.3

Ensure custom error messages are not off

RendahLevel 2Otomatisiis

Deskripsi

When an ASP.NET application fails and causes an HTTP/1.x 500 Internal Server Error, or a feature configuration (such as Request Filtering) prevents a page from being displayed, an error message will be generated. Administrators can choose whether or not the application should display a friendly message to the client, detailed error message to the client, or detailed error message to localhost only. customErrors mode must be RemoteOnly or On (not Off) in the root web.config and every site. PowerShell 5.1 with the WebAdministration module; run elevated.

Cara pemeriksaan

Metode audit: Perintah shell

shell

Import-Module WebAdministration -ErrorAction Stop; $paths = @('MACHINE/WEBROOT') + @(Get-Website | ForEach-Object { "IIS:\Sites\$($_.Name)" }); $bad = @($paths | Where-Object { $c = Get-WebConfiguration -Filter 'system.web/customErrors' -PSPath $_; [string]$c.mode -eq 'Off' }); if ($bad.Count -eq 0) { 'compliant' } else { 'noncompliant' }

Output yang diharapkan: compliant

Cara perbaikan

Metode perbaikan: Panduan atau patch infrastruktur

Set-WebConfigurationProperty -PSPath 'MACHINE/WEBROOT/APPHOST/<site>' -Filter system.web/customErrors -Name mode -Value RemoteOnly

Properti

Sistem operasi: Apa saja
Tag: iisinformation-disclosure
Referensi: CIS Microsoft IIS 10 Benchmark v1.2.1 - 3.3 Ensure custom error messages are not off

Periksa host ini

Jalankan ini pada mesin yang diizinkan untuk Anda audit. Pemindaian bersifat hanya baca.

shell

tmaegis scan --target iis --level 2